package com.zds.support.util;


import android.app.Activity;
import android.content.ContentResolver;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Rect;
import android.provider.Settings;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.RatingBar;

public class ScreenUtils {
    private ScreenUtils() {
        throw new UnsupportedOperationException("cannot be instantiated");
    }

    /**
     * 获得屏幕高度
     *
     * @param context
     * @return
     */
    public static int getScreenWidth(Context context) {
        WindowManager wm = (WindowManager) context
                .getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics outMetrics = new DisplayMetrics();
        wm.getDefaultDisplay().getRealMetrics(outMetrics);
        return outMetrics.widthPixels;
    }

    /**
     * 获得屏幕宽度
     *
     * @param context
     * @return
     */
    public static int getScreenHeight(Context context) {
        WindowManager wm = (WindowManager) context
                .getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics outMetrics = new DisplayMetrics();
        wm.getDefaultDisplay().getRealMetrics(outMetrics);
        return outMetrics.heightPixels;
    }

    /**
     * 获得dpi
     *
     * @param context
     * @return
     */
    public static int getScreenDpi(Context context) {
        WindowManager wm = (WindowManager) context
                .getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics outMetrics = new DisplayMetrics();
        wm.getDefaultDisplay().getRealMetrics(outMetrics);
        return outMetrics.densityDpi;
    }

    /**
     * 获得状态栏的高度
     *
     * @param context
     * @return
     */
    public static int getStatusHeight(Context context) {
        try {
            Resources resources = context.getResources();
            int resourceId = resources.getIdentifier("status_bar_height", "dimen", "android");
            int height = resources.getDimensionPixelSize(resourceId);
            return height;
        } catch (Exception e) {
            int statusHeight = -1;
            try {
                Class<?> clazz = Class.forName("com.android.internal.R$dimen");
                Object object = clazz.newInstance();
                int height = Integer.parseInt(clazz.getField("status_bar_height")
                        .get(object).toString());
                statusHeight = context.getResources().getDimensionPixelSize(height);
            } catch (Exception e1) {
                statusHeight = DensityUtils.dp2px(24f);
            }
            return statusHeight;
        }

    }

    /**
     * 获取当前屏幕截图，包含状态栏
     *
     * @param activity
     * @return
     */
    public static Bitmap snapShotWithStatusBar(Activity activity) {
        View view = activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap bmp = view.getDrawingCache();
        int width = getScreenWidth(activity);
        int height = getScreenHeight(activity);
        Bitmap bp = null;
        bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
        view.destroyDrawingCache();
        return bp;

    }

    /**
     * 获取当前屏幕截图，不包含状态栏
     *
     * @param activity
     * @return
     */
    public static Bitmap snapShotWithoutStatusBar(Activity activity) {
        View view = activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap bmp = view.getDrawingCache();
        Rect frame = new Rect();
        activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
        int statusBarHeight = frame.top;

        int width = getScreenWidth(activity);
        int height = getScreenHeight(activity);
        Bitmap bp = null;
        bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height
                - statusBarHeight);
        view.destroyDrawingCache();
        return bp;

    }

    /**
     * Get current screen brightness, 0 to 1 adjusts the brightness from dark to full bright.
     *
     * @param activity
     * @return
     */
    public static float getCurrentScreenBrightness(Activity activity) {
        float brightness = activity.getWindow().getAttributes().screenBrightness;
        if (brightness < 0) {
            try {
                ContentResolver cr = activity.getContentResolver();
                brightness = Settings.System.getInt(cr, Settings.System.SCREEN_BRIGHTNESS) / 255.0f;
            } catch (Settings.SettingNotFoundException ex) {
            }
        }
        return brightness;
    }


    /**
     * 动态设置Ratingbar高度，解决图片在不同分辨率手机拉伸问题
     *
     * @param context
     * @param ratingBar
     * @param resourceId 本地图片资源Id
     */
    public static void setRatingBarHeight(Context context, RatingBar ratingBar, int resourceId) {
        Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), resourceId);
        int height = bitmap.getHeight();
        ViewGroup.LayoutParams params = ratingBar.getLayoutParams();
        params.height = height;
        ratingBar.setLayoutParams(params);
    }

}
